Starting device for explosion-engines.



No.813 ,959. PATENTED FEB. 27, 1906,

v. BRDMENGER;- STARTING DEVICE FOR EXPLOSION ENGINES.

APPLICATION I'ILED APB. 12,1905.

3 SHEETS-SHEET 2.

6 F 61 45/ r a 1 x /4 v w v 4- v -uI//// ///////A No. 313,959. PATENTEDFEB. 27, 1906.

v. ERD'MENGER.

STARTING DEVICE FOR EXPLOSION ENGINES. I .L PPLIOATION TILED APB .12,1905.

3 SHE-SHBET 3.

nmrsn STATES 'I'ZATENT OFFICE.

' VICTOR ERDMENGER, OF ESSEN-ON-THERUHR, GERMANY, ASSIGNOR TO FRIED.KRUPP AKTIENGESELLSCHAFT, or ESSEN-ONTHE-RUHR,

GERMANY.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Applioationfiledhpril12,1905. Seria1No.255.210. I

To all] whom, it may concern: I

Be it known that I, V'IoToR ERDMENGER, a 5 subject of the GermanEmperor, and a resi-. dent of Essen-on-the Ruhr,Germany, have inventedcertain new-find useful Improve' ments in Starting Devices forExplosion-En-I gines, of which the following is a specification.

. responds to one stroke of The present invention relates to a starting?device for double-acting four-cycle explosionengines, and in particularto the kind of starting devices in which compressed air is used forstarting such explosion-engines. As commonly known, the working of suchan engine dur' the explosion operation takes place according to. thediagrams Y Y (Shown in Figure 4 of the accompanying drawings.) Thediagram Y relates to the front part of the cylinder, while the diagram Yrelates to the rear part of the cylinder. The vertical lines I to IVindicate the limits of the four phases of the four-cycle operation.Each. of they phases I to II, II to III, and so on corthe workingpiston. In the diagram Y of the frdnt part of the cylinder' theexplosion takes place at the point I. The phase I to II indicates theexpansion, thehase II to III the exhaust, the phase III to IV thesuction, and the phase IV to I the compression. The phases of the workinin the; rear art of the cylinder shown in the ia ram Y f0 low oneanother in the same order 0 succession; but, as a comparison of the twodia grams shows, the phases in the diagram Yilag one phase behind thephases in the diagram Y, so that in the diagram Y the moment of theexplosion coincides with the point II,

I while the expansion takes place in the phase II to III, the exhaust inthe phase III to IV,

the suction in the phase IV toI, and the compression in the phase I toII. The starting, too, has to take place in four phases in such a mannerthat compressed air is introduced into the cylinder parts in the phasesin which explosion or expansion would take place if the operation wascaused by explosion Thus the compressed air would in the presentinstance be introduced into the front part of the cylinder in the phaseI to II and into the rear part of the cylinder in the phase II to III.According to the above remarks the working proceeding in the front andin the rear part of the cylinder when theen '11s is started takes placecorresponding to t diagram X X.

her as by explosionoperation.

bodiment of the improved 1 (Shown in Fig. 4.) The introduction phase Ito II of the starting diagram X for the front part of the cylinder issucceeded by exhaust in the phase II to III in the same man- Thesucceeding two phases III to IV and IV to I differ from thecorresponding phases of the explosion operation in so far as therecannot be any suction and compression, because the gas and air pipes forthe inlet-valve as used by explosion operation have to be closed duringthe starting. The suction phase and the compression phase are thereforein the starting replaced by a low pressure in the phase III to IV, whichin the succeeding phase IV to I is again brought back to atmosphericpressure. The phases of the working diagram X of the rear part of thecylinder follow one another in the same order of succession as theexhaust-in the phase II to IV, the low pressure in the phase IV to I,and the return to atmospheric pressure in the phase I to II.

. In the accompanying drawings one emshown by way of example.

Fig. 1 is a diagrammatic view of the starting device and part of theworking cylinder, partly in section. I ing to Fig. 1 with alteredposition of the slidevalve. Fig.3 is a view corresponding to Fig. 1 withstill another position of the slidevalve. Fig. 4 is adiagrammaticillustration of the phases, as fully explained'above. Fig;.5 is a diagrammatic view showing the start V in device on a reducedscale and also the cylin er and the source of compressedair, and Fig. 6shows a detail.

-A slide-valve A is arranged to slide in a cylindrical hollow space 1 ofahousing B, ar-

ranged on' the wor ing cylinder C, havin piston K. The up er and lowerends oi the valve A fit tightly the wall of the space 1 by means ofpacking-surfaces a 0. while the central part of the valve is reduced soas to form an annular space 2. The slide A is by means of a link Dconnected to one arm E of a controlling-rod E E, which is pivoted in asupport I), projecting from the housing B. The other arm E of thecontrolling-rod'terminates in an eye member e in the perforastartingdevice is- Fig. 2 is a viewcorrespondof the engine in sucha manner thatit during the operation may be coupled to either ofsaid parts, so as toeither rotate with the shaft H or remain stationary. On the .drawingsthe controllingdisk G is divided into four quadrants I to II, II to III,III to IV, and IV to I. In the quadrants III to IV and IV to I thecurved move 9 extends concentric with the control ing-shaft H, While inthe quadrant I to II the curve is bent inwardly andin the uadrant II toIII the curve is bent outwardly.

Passages 3, 4, and 5 provide for communi-.

cation between the annular space 2 and annu lar chambers 6, 7, and 8.The annular chamber 6 communicates with the perforation of a projectionb, to which is secured the conduit J for the compressed air. The annularchamber 7 communicates with the front art of the working cylinderthrough the me ium of channels 9 and c, and the annular chamber 8communicates with the rear art of the working cylinder through'the meium of channels 10 and c The controlling-shaft H is in the usual mannerdriven from the crank-shaft at the ratio of two to one, and eachhalf-rotation of the crank-shaft or each stroke of the working. pistonwill therefore effect one-fourth of a rotation of the controlling-disk.

In Fig. 1, which illustrates the intermediate position of the valve A,the annular space 2 communicates with the conduit J for the compressedair. The flow from the compressedair source M may be regulated by meansof a valve N. The passages 4 and 5 are closed by the packingfaces a anda of the valve A, so as to prevent the com ressed air from passing fromthe space 2 to t e working cylinder. The valve A remains in theintermediate position for so lon a time as the roller F is in engagementwith any point of the groove parts III to IV and IV to I that are concentric with the controlling-shaft. When the controlling-disk G rotateswith the control ling-shaft H in the direction of the arrow 2, Fig. 1,the roller F will enter into engagement with the part I to II of thecurved groove. This causes the arm E of the controlling-lever to ascendwhile the arm E descends, and the valve A therefore moves downwardly.When the roller F reaches the most inwardlybent place of the curvedgroove, the valve assumes the position shown in Fig. 2, in which onlythe passages 5 are closed, while the assa es 3 and 4 communicate withone anot er t ough the annular space 2. Com- Y slide moves ressed aircan therefore pass from the annuar space 2 through the passages 4 to theannular chamber 7, from where it passes through the channels 9 and c anda suitable valve (1 to the front part of the working cylinder. (Phase Ito II of the diagram X By the further turning of the controlling-dis thevalve A reverses its direction of movement and the face a closes thepassages 4.

When the oint II of the groove reaches the roller F, t e valve reassumesthe position shown in Fi 1, and when the outwardlybent part I to IIIreaches the roller the u Ward, thereby opening the passages 5. If themost outwardly-bent place of the curved groove has reached the roller F,the valve assumes the position shown in Fig. 3, in which the compressedair can pass by the way 2, 5, 8, 1.0, and 0 d to to the rear art of theworking cylinder. (Phase II to III of the diagram X In the furthercourse of theturning of the controlling-disk the valve Aagain reversesits direction of movement and the face a closes the passages 5. From theoint III of the groove the valve reassumes t e intermediate positionshown in Fig. 1 and remains in such po sition during one-half rotationof the con-- trolling-disk. of the diagrams X and X In the point I ofthe curved groove g the play starts over again. It will thus be seenthat the introduction of compressed air into the front part of thecylinder takes place in phase I to II and that the compressed-airconduit is closed with re ard to the front art of the cylinder in phasesII to III, III to V, and IV to I. The introduction of compressed airinto the rear art of the cylinder takes place in phase II to III, andthe compressed-air conduit is closed with re ard to the rear part of thecylinder in phases 'II to IV, IV to I, and I to II. The workingproceeding after the closin of the compressed-air conduit in phases I Ito III, III to IV, and IV to I with re ard to the front art of the clinder and in p ases III to IV, IV to I, and I to II with regard to therear part of the cylinder must necessarily take place in the mannershown in the dia grams X X*, and it is therefore evident that an exlosion-engine provided with the improve starting device works as afour-cycle one.

When it is desired to start the engine, the grooved disk is con led. tothe-controllingshaft. The fly-whee is then turned until the grooved diskassumes a position in which the roller F engages part I II of the disk,thereby causing compressed air to pass to the front part of thecylinder. From this moment the engine is driven automatically by meansof the compressed air. To pass over to the explosion operation, thegrooved disk is un coupled from the controlling-disk, which then turnsin the disk without carrying the (Phases III to IV and IV to I I IIOsame along'. The disk is thereiieon turned to and secured in a positionwhich the roller F engages with any point ofthe part of oove g that isconcentric with the con-.

the trolhn shaft, in which-"gositionfthe' com- {ijresse air is cutofi'byt e. .v'alve A,'liig. '1.

pon the opening of the gas' and' air conduit for the inlet-valve usedfor the explosion and 119011 making connection-for the sparking de-;v1ce. the engine works with "explosion -op-' eration.

for connecting the means first named to the drivin member of the en in'eto be started, wherebwwhen the air is admitted to one end of thecylinder, the subsequent'movements follow automatically. .2. Incombination with adouble-acting four-cycle explosiomengine and asuitable source ofcompressed air a valve movable to 39 opencommunication'for the compressed an" cessive strokes'of the en 7--valve' .to the cut-ofi' osition duringthe two The foregoing with firstone end of the cylinder and then the other end of the cylinder and thenmovable to a position to cut off said air-Suppl from both endsofthe-cylinder, and a cam a apted to be driven-by'the engine, andconstructed to impartjthe'two opening movements during suce and to movethe following strokes of t e engne. combination wit 7 a double-actingfonrcycle explosion-engine," a suitable source of compresse'd air,passages leading to the re spective endsfofthe cylinder and a'valveconstructed'to-assunie twoconsecutive positions whichopen communicationsuccessively with the respectiveends of the cylinder, andan intermediateposition which cuts ofi commu nication with .both ends of the cylinder,a cam imparting the three movements to the valve during breakingconnection between the cam and a driven member of the engine.

seldorf this 31st day of March, A. D. 1905.

' vroron ERDMENGER.

In presenceof- PETE LIEBER,.

WILLIAM Essnnwnm;

ifi'erent strokes of the engines movements, and means for making andspecification signed at Diis

